1. Why is it essential to compare the cosmetic ingredients and properties of the different brands of products? 2. What are your criteria in choosing the brand of the cosmetic products that you use? 3. How important is the study of the different cosmetic ingredients and their functions?

Q: The cathode is the electrode at which oxidation occurs. O True O False

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Micelles and Biological Membrane

Micelles are the type of lipid molecules that organize themselves in spherical shape in aqueous solutions. The production of the micelle is a reply to the amphipathic behavior of fatty acids. It means that they consist of both hydrophobic regions and hydrophilic regions. In micelles, polar head groups (hydrophilic groups) produce an outer layer associated with water whereas nonpolar tails (hydrophobic groups) are organized in the interior.